Se puede verificar el cumpleaños en el formulario 2018-09-01
(([0-9] {3} [1-9] | [0-9] {2} [1-9] [0-9] {1} | [0-9] {1} [1-9 ] [0-9] {2} | [1-9] [0-9] {3}) - (((0 [13578] | 1 [02]) - (0 [1-9] | [12] [0-9] | 3 [01])) | ((0 [469] | 11) - (0 [1-9] | [12] [0-9] | 30)) | (02- (0 [ 1-9] | [1] [0-9] | 2 [0-8])))) | ((([0-9] {2}) (0 [48] | [2468] [048] | [13579] [26]) | ((0 [48] | [2468] [048] | [3579] [26]) 00)) - 02-29)